High-lift centrifugal pump.



PATENTED SEPT. 1, 1908. G. LAGER.

HIGH LIFT GENTRIPUG AL PUMP.

APPLICATION FILED JUNE 7, 1904.

2 SHEETSBHBET 1 rrn u| mm llllllllllllli CARL LAGER, OF BALDWINBVILLE,NEW YORK HIGH-LIFT OENTRIFUGAL PUMP.

. Specification of Letters Patent.

Patented Sept. 1, 1908.

Application filed June '1, 1&04. Serial m1.- 211,450.

To all whom it may concern:

Be it known that I, CARL-LAGER, of Bald-.

winsville, in the county of Onondaga, in the State of New York, haveinvented new and useful Improvements in Hi h-Lift Centrifugal Pumps, ofwhichthe fo owing, takenin connection with the accompanying drawings,

is a full, clear, and exact eson'ption.

This invention relates to improvements in high-lift centrifugal pumps,in'which a'plura 'ty of umping runners are connected in series anoperate to force the water successively from one to the other, eachadding pressure to that preceding it. In any centrifu al pum receivingwater 1n one side or end t are is a ways an end pressure toward thesuction opening correspond-' to the area of such opening multiplied bythe pressure per unit o'f'such area, and therefore if the suctionopenings of the several thrust or pressure in the direction of suchopenings would be substantiall 'equal to the sum total of the ressureson a the runners. My object, there ore, is to establish an equi libriumof this pressure in all directions and to balance the runners and itsdriving'shaft by a particular relative arrangement of the runners andintercommunicating passages so that the endpressure on-one or morerunners in one direction is counteracted by a corresponding' pressureonone or'more of the other runners in the opposite direction, therebypreventing'excessive end thrust in either direction.

Another object is to construct the case and diaphra'gms in separate 1arts so that each may be easily and quic y machined and fitted andassembled without employing special machinery or tools. x

Other objects and uses will appear in the following description.

In the drawings-Fig'urel is a top plan of a cent a1 pump embodgng thevarious features 0 my invention. igs. 2, 3, 4, and 5 are sectional viewstaken respectively on lines 2.2 Fig. 1 and 3 3, 44, and 5'5 2., 6 and 7are pective views of 'alf sections of one of the on and the intermediatediaphra m.

The ump-case is preferab y made in two parts 0 cast metal consisting ofa lower half section 1 and 'an upper half section end and securedtogether at their'meetdiaphragms,

ing faces by suitable means, as bolts 3, thereb forming a rigid case orshelf with a central lengthwise opening 4, the .ends of which are closedby suitable caps or circular plates 5 and 5- having central 0 enings 6.These plates are secured to t e ad acent. ends'of the shell sections bysuitable means, as bolts 7, and are provided with central end journalbearings 8 and 8, in which is rotatingly mounted a driving shaft 9, thehearin 8, being closed at its outer end while the other bearmg 8 isprovided with a suitable stufl ing box through which the shaft projectsto be connected to any power transmitting mechanism, not shown.

Secured to the shaft 9 between the heads or caps -5 and 5- are a seriesof pumpin runners 10, 11', 12 and 13- w ich are s aced apart by spacingsleeves 14 an are each formed in one side or face with a central waterinlet or passage 1 5 extending inwardly and radially through the peripheof the runner, the ravanes or artitions '-16 which are con vexed in t edirection of rotation to facilitate the expulsion of he water.

The interior of the sheel is dividedat intervals by transversepartitions or diaphragms 17, 17 and 18 to 'form a'series of and eachdiaphragm is provided with -a central shaft bearing 19 and with on'f-ormore annular ribs 20 which are .fitte In corresponding rooves 21+ in theinner wall of the she so that the shell sections whenclamped to dia hrams rigid y in'place.

11 order to obviate excessive and thrust of the runners and theirdriving shaft the inlets pressure are arranged to face in one directionwhile the inlets of the remaining runners representing a correspondinpressure are caused to face in the opposite (Erection and I havetherefore shown the runners 10' and 13- -as having their inlets facingas to the r' ht, and the inlets of the runners -11 an 12- as facing inthe opposite direction or to the left, as best seen in ig. 2, thisarrangement causing the inlets of he ,runners 10 and11 to face eachother which necessitates a special ,construction and ar-' --rangement ofthe diaphr'ag'ms and their water then operate to clamp the in onedirection,

.80 dial passage being ivided at intervals by compartments in which therunners revolve of certain runnersirepresenting a' definite is also trueor theinlets'12-1 and;13-'. mm-a passages, and also of thewater passagesof the shell or casing and, to this end, the diaphragm' 17- 1sinterposed between I the runners;-10 and 11 and is formed. withdiametrically opposite water ways 23. and 24which are separated by anoblique partition 25, the passage 23 leading from an inlet -26.in thelower shell section 1 to the central passa e of the runner 10 at oneside of the partition 25, and the passage 24- communicates with theinlet of the runner 1 1.

The shell or inclosing'case isformed with a series of spiral conduits orpassages 27,' 28', 29- and 30, which encircle their respective runners10-, 1 1, 12 and 13 and communicate with the compartments in which theyrevolve. The passage -27- 'receives the water discharged from'theperiph-' cry of the runner 10 and terminates in an outside by-pass 27-which discharges into metrically op the water-way' 24, the water beingthen deflected by the oblique partition 25 into the central-inlet of therunner 11 v from which it is discharged into the spiral assage '28-, andthence through an outside ass 28 and into :the water-way 3'2 phragm -v17, and located between the runners 12 and 13* and is formed'withdiaosite water-ways 32 and '33 and an o liquef' partition 34' whichseparates said water-w s I and alsothe cenml inlets in h rsf -j- 12 and13 so that the water entering 'the passage 32 is deflected bytheipartltion -34 into the J central inlet of therunner 12* from whichit 40 This is discharged into the spiralpassage '29'. pass e 29 has alateral extension -3.5'-,wh1ch dischargesinto the passage 34-whereby thewater is deflected into I34' at the lower front side of the partitionthe central inlet of the runner 13' and from this runner is dischargedinto the spiral a discharge nozzle '36"also in the lower shell section iI It is now apparent that the water is. drawn through the inlet 62'centrally. into the right side of the runner 10- from which itdischarges through the passages 27,'

Q27'- and -24 and enters centrally into fithe left side of the runner11, thence into the gassa es '-28-, 28 and 32, centrall 1 to t 1e leitside of the runner l2 and heel throu h t intot 1e right side of therunner 13- from which it is finally discharged through the assage 30-and outlet nozzle 36. ow, if the pressure on the pump runner -10 istenpounds,=the pressure on the run- This diaphra m 18 is of the sameconstructionas the rae passages 29-, 35 and-33- ner 11vwill be twentypounds that on the runner -12 thirty pounds, and that on the runner 13,forty poundsthese pressures being all in the direction of theirrespective inlets. But the inlets of the runners -1'0 and 13 face in thesame direction and, therefore, the pressure in this direction is tenpounds on the runner :10- and fort v or a 'tota o fifty pounds, whilethe inlets'of ounds on the runner 13"-' the runners 11 and l2 face inthe other direction, and therefore, the pressure in this' direction istwenty pounds on the runner -.12 or a total of fifty pounds-: whichestablishes .an equality of pressure upon the ump runners and maintains;them and the s aft in equilibrium to prevent end thrust in eitherdirection; I v

7 runner 11 and thirty pounds on the It will be observed upon referenceto Figs.

Y2 and 6 that the deflecting-plates'orp'artis tions of the diaphragms17. and 18+f extend from one side of the circular inlet-of one of therunners to the oppositeside of the inlet of the adjacent runneiitherebyseparating the inlets of adjacent runners from each other.

The diaphragm l7''- difl'e rs from the other diaphragms'in that it ismerely a dividing partition without any passages and serves I toseparate the runners '1 1 and 12 and passages 28 and 3()-. Y

In assembli g-the parts of thispurnp the afiagmsand separatih sleevesrunners, di are placed over theend of the sha t in the order shown inFig. 2 and the runners and separating sleeves are then clam ed against ashoulder 38 at one end oft e shaft by;

means of clamping. nuts 39 which are engaged with t e opposite end ofsaid shaft,

by suitable key p Having thus described my invention what I claim anddesire to secure byLetters Patent is the runners being further locked tothe'shaft In a multistage centrifugal a casing having impeller chambersand annular'delivery passages, and an inlet betweenthe de= liverypassages im ellers'in saidchambersacin each other, adiahaving theirinlets phrag n separating said c ambers and having r se arate passa es,one gconnecting the casing in et to one o 'the impeller inlets, and theother connectin the delivery other impeller.

111% of the last I mentioned impe ler with the inlet of the In witnesswhereof Ihave hereunto set my hand this 1st day of June. 1904.

' CARL LAGER.

' Witnesses:

H. E. CHAsE, MILDRED M. NO'rr.

